Makes sense that the most popular AUR packages will be candidates for the main repo.
I understand that having a relatively small number of people maintaining a large number of packages makes it burdensome to manually update everything, but on the other hand, nobody asked me before promoting the AUR package I maintained to the main repos, and I would have been happy to keep doing it indefinitely! I'm not a "official trusted contributor" by any means, but I also know that I would have kept doing what I already did for years in exactly the same way without any issues, so I can't help but feel a bit like like a known good with hypothetical risks was thrown away for something that will produce at best the same results with less severe but more concrete risks. I wish I had a solution for not getting stuck at that local optimum, but incidents like the one in the article will only make it more of an uphill battle.
(edit: to clarify, I'm not proposing that the package should have been left in the AUR, but that I wish there were a way for them to have just let me keep maintaining it as an "official" package. Maybe something like the kernel model where someone trusted could vet the PKGBUILD updates I do and decide whether to merge them or not rather than doing the same but with a bot, and then maybe not noticing that the bot is silently failing...)